<?php

/**
 * Simple caching of query results for Views displays.
 */
class views_plugin_cache_time extends views_plugin_cache {

    function option_defaults(&$options) {
        $options['results_lifespan'] = 3600;
        $options['output_lifespan'] = 3600;
    }

    function options_form(&$form, &$form_state) {
        $options = array(60, 300, 1800, 3600, 21600, 518400);
        $options = drupal_map_assoc($options, 'format_interval');
        $options = array(-1 => t('Never cache')) + $options;

        $form['results_lifespan'] = array(
            '#type' => 'select',
            '#title' => t('Query results'),
            '#description' => t('The length of time raw query results should be cached.'),
            '#options' => $options,
            '#default_value' => $this->options['results_lifespan'],
        );
        $form['output_lifespan'] = array(
            '#type' => 'select',
            '#title' => t('Rendered output'),
            '#description' => t('The length of time rendered HTML output should be cached.'),
            '#options' => $options,
            '#default_value' => $this->options['output_lifespan'],
        );
    }

    function summary_title() {
        return format_interval($this->options['results_lifespan'], 1) . '/' . format_interval($this->options['output_lifespan'], 1);
    }

    function cache_expire($type) {
        if ($lifespan = $this->options[$type . '_lifespan']) {
            $cutoff = time() - $lifespan;
            return $cutoff;
        } else {
            return FALSE;
        }
    }

    function cache_set_expire($type) {
        if ($lifespan = $this->options[$type . '_lifespan']) {
            return time() + $lifespan;
        } else {
            return CACHE_PERMANENT;
        }
    }

}
